Failure to provide what was signed for

My mom took out a contract for me on her name on 20 January 2015 as I currently do not earn enough to do so myself. The contract we initially decided on was a Smartplan 100 which included a Samsung Galaxy Pocket Neo cellphone for R99p/m with an additional 1gig of data per month. <br> <br> We signed the contract and three days later we were told that the cellphone is out of stock and they can no longer help us if we want that specific deal. I then decided I would sacrifice the cellphone as I already have one, and take out a SIM-only contract for the same price per month with the exact same benefits. I use quite a lot of data and thus the additional 1gig of data largely appealed to me.<br> <br> We thus signed for the SIM-only contract and it was processed, only to find out that I would never receive the additional gig of data as promised. Furthermore I am unable to make calls to certain Vodacom numbers since I ported from Vodacom to Telkom Mobile.<br> <br> My mom went in to cancel the contract as Telkom was severely in breach of contract and to this day nothing has happened. I was also explicitly informed that I would not need to pay a connection fee of R200 which was charged to my mom's account!